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Author Topic: Are there any good mods for Yam DT2 forks?  (Read 4113 times)

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Offline John Orchard

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Are there any good mods for Yam DT2 forks?
« on: December 27, 2018, 06:43:31 pm »
Does anyone know of tricks for Yam DT2 forks in making them race-ready?
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Offline David Lahey

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Re: Are there any good mods for Yam DT2 forks?
« Reply #1 on: December 27, 2018, 11:49:48 pm »
Cartridge emulators are available. I run Race Tech gold valves in a set of TY250 forks which like the DT2, have 34mm Kayaba fork tubes. The gold valves took ages to get set up but are quite good now.
On another trials bike with TY250 forks I have fitted aftermarket (modern) damper rods made in the UK which worked great without any setting up required. They are made of aluminium, have slightly more travel than standard (about 5mm extra) and most importantly have much better damping action than the standard damper rods provide.
I'm sure either of those methods would also make DT2 forks work better for MX.
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Offline John Orchard

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Re: Are there any good mods for Yam DT2 forks?
« Reply #2 on: December 28, 2018, 09:27:14 am »
Quote from: David Lahey on December 27, 2018, 11:49:48 pm
Cartridge emulators are available. I run Race Tech gold valves in a set of TY250 forks which like the DT2, have 34mm Kayaba fork tubes. The gold valves took ages to get set up but are quite good now.
On another trials bike with TY250 forks I have fitted aftermarket (modern) damper rods made in the UK which worked great without any setting up required. They are made of aluminium, have slightly more travel than standard (about 5mm extra) and most importantly have much better damping action than the standard damper rods provide.
I'm sure either of those methods would also make DT2 forks work better for MX.


Thanks Dave :-)  Any idea what company in the UK made the damping rods? l'd like to get some.
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Offline mboddy

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Re: Are there any good mods for Yam DT2 forks?
« Reply #3 on: December 28, 2018, 10:52:23 am »
What is the inside diameter of the fork tube? You might be able to use one of these cheap valves.
https://www.mikesxs.net/yamaha-xs650-damper-valve-pr-front-forks-77-84-oem-1t3-23170-00-00.html
I have a valve here I can measure for you.
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Offline John Orchard

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Re: Are there any good mods for Yam DT2 forks?
« Reply #4 on: December 28, 2018, 02:11:54 pm »
Quote from: mboddy on December 28, 2018, 10:52:23 am
What is the inside diameter of the fork tube? You might be able to use one of these cheap valves.
https://www.mikesxs.net/yamaha-xs650-damper-valve-pr-front-forks-77-84-oem-1t3-23170-00-00.html
I have a valve here I can measure for you.


Thanks :-)  Hmmm they look a version of Goldvalve, l'll measure my forks, do you have two to sell?
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Offline mboddy

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Re: Are there any good mods for Yam DT2 forks?
« Reply #5 on: December 28, 2018, 05:05:25 pm »
Quote from: John Orchard on December 28, 2018, 02:11:54 pm
... do you have two to sell?

I have a pair I am not using so I suppose I could sell them to you.
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Vinduro Penrite Team
1980 Yamaha IT125G, 1979 Yamaha IT175F, 1984 Yamaha IT200L, 1977 Yamaha IT250D and IT400D

Offline John Orchard

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Re: Are there any good mods for Yam DT2 forks?
« Reply #6 on: December 28, 2018, 06:40:17 pm »
Cool, l'll gets the forks apart and determine the next step. Thanks.
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Offline tony27

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Re: Are there any good mods for Yam DT2 forks?
« Reply #7 on: December 29, 2018, 05:06:16 pm »
Quote from: John Orchard on December 28, 2018, 09:27:14 am
Quote from: David Lahey on December 27, 2018, 11:49:48 pm
Cartridge emulators are available. I run Race Tech gold valves in a set of TY250 forks which like the DT2, have 34mm Kayaba fork tubes. The gold valves took ages to get set up but are quite good now.
On another trials bike with TY250 forks I have fitted aftermarket (modern) damper rods made in the UK which worked great without any setting up required. They are made of aluminium, have slightly more travel than standard (about 5mm extra) and most importantly have much better damping action than the standard damper rods provide.
I'm sure either of those methods would also make DT2 forks work better for MX.

These will be the parts, I have the full set up in my TY250 & the difference to how the forks were is huge
http://www.yamaha-majesty.com/?product=ty250-alloy-damper-rods
Thanks Dave :-)  Any idea what company in the UK made the damping rods? l'd like to get some.
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